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@knopp knopp commented Feb 20, 2025

This enables running UI isolate on platform thread by default.

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@github-actions github-actions bot added engine flutter/engine related. See also e: labels. platform-windows Building on or for Windows specifically a: desktop Running on desktop labels Feb 20, 2025
@knopp knopp force-pushed the windows_enable_merged_platform_ui_thread branch from f83e711 to 4e8b9af Compare February 26, 2025 16:46
@knopp knopp changed the title WIP: [Windows] Enable merged platform and UI thread by default [Windows] Enable merged platform and UI thread by default Feb 26, 2025
@knopp knopp requested a review from loic-sharma February 26, 2025 17:46
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Hey there, could we wait 1 stable release before turning this on by default? Merged threads is a risky change that might regress apps. Waiting 1 stable release will give us the chance to ask Windows customers to opt-in to merged threads and give us feedback if they run into any problems.

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knopp commented Feb 26, 2025

I think on iOS and Android this got enabled pretty quickly on main. Could we maybe enable this on main after next beta is branched?

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We have much stronger confidence in iOS and Android changes since we have Google apps that we can test on to find regression. Also, Flutter's iOS and Android teams are significantly larger and have capacity to hotfix regressions. Sadly desktop isn't as well staffed, so I'd like to minimize our chance for regressions if possible. Unfortunately, the beta branch has very low usage. We haven't had much success getting customers to dogfood changes on beta branches.

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knopp commented Feb 26, 2025

Not sure that answers my question? What's wrong with enabling it on main after the next beta branches from main, so that it is disabled by default in the next stable, but enabled in main (after the beta branch, which I'd assume would happen sometimes next week)?

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loic-sharma commented Feb 27, 2025

Sorry, I misread your question. That sounds good to me 👍

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Thanks for doing this! :)

@knopp knopp force-pushed the windows_enable_merged_platform_ui_thread branch 4 times, most recently from 155ef7a to 8f18c1b Compare April 16, 2025 10:10
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Changes reported for pull request #163726 at sha 5ad4c87

@flutter-dashboard flutter-dashboard bot added the will affect goldens Changes to golden files label Apr 16, 2025
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knopp commented Apr 16, 2025

Not sure where the goldens change is coming from?

@knopp knopp force-pushed the windows_enable_merged_platform_ui_thread branch from 5ad4c87 to 7223b45 Compare April 17, 2025 14:12
@knopp knopp added this pull request to the merge queue Apr 17, 2025
Merged via the queue into flutter:master with commit afdc861 Apr 17, 2025
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@knopp knopp deleted the windows_enable_merged_platform_ui_thread branch April 17, 2025 16:16
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@knopp Man, flutter still alive because of people like you. Highly respecting you!

auto-submit bot pushed a commit to flutter/packages that referenced this pull request Apr 18, 2025
flutter/flutter@ecabb1a...3ed38e2

2025-04-18 [email protected] Update `led` docs (flutter/flutter#167380)
2025-04-18 [email protected] Throw an error if --local-engine-host is used without --local-engine (flutter/flutter#166948)
2025-04-18 [email protected] Add kotlin compatability to build file validation (flutter/flutter#167143)
2025-04-18 [email protected] Roll Skia from 844496884aa0 to 6c4595124690 (2 revisions) (flutter/flutter#167400)
2025-04-18 [email protected] Fix CarouselView crashes when initlal viewportDimension is 0.0 (flutter/flutter#167271)
2025-04-18 [email protected] Roll Dart SDK from b1eb743f97f5 to ab60afc99bcb (1 revision) (flutter/flutter#167396)
2025-04-18 [email protected] Add InputDecoration.visualDensity and InputDecorationTheme.visualDensity (flutter/flutter#166834)
2025-04-18 [email protected] Roll Skia from acc910544da7 to 844496884aa0 (1 revision) (flutter/flutter#167389)
2025-04-18 [email protected] Roll Skia from a409d685a711 to acc910544da7 (10 revisions) (flutter/flutter#167388)
2025-04-18 [email protected] Roll Dart SDK from 2bb85834e77e to b1eb743f97f5 (2 revisions) (flutter/flutter#167387)
2025-04-18 [email protected] Roll Fuchsia Linux SDK from m8Aln7fTF_8zy1V9N... to MwYckh5OvwwmIYLx0... (flutter/flutter#167385)
2025-04-17 [email protected] Roll Skia from cc2b57434651 to a409d685a711 (3 revisions) (flutter/flutter#167347)
2025-04-17 [email protected] Reduce app startup latency by initializing the engine on a separate thread (flutter/flutter#166918)
2025-04-17 [email protected] Roll Dart SDK from 992221a362ec to 2bb85834e77e (7 revisions) (flutter/flutter#167361)
2025-04-17 [email protected] Added docstring for FilterInput::GetSnapshot (flutter/flutter#167226)
2025-04-17 [email protected] adds Entity docstrings (flutter/flutter#167228)
2025-04-17 [email protected] fixed impeller golden content scale (flutter/flutter#167308)
2025-04-17 [email protected] Added docstring for FilterContents::RenderFilter (flutter/flutter#167227)
2025-04-17 [email protected] Feat: Add equality to NoDefaultCupertinoThemeData (flutter/flutter#166655)
2025-04-17 [email protected] Fix link to engine docs (flutter/flutter#167346)
2025-04-17 [email protected] [macOS] Enable merged platform and UI thread by default (flutter/flutter#166536)
2025-04-17 [email protected] [Windows] Enable merged platform and UI thread by default (flutter/flutter#163726)
2025-04-17 [email protected] Update `CHANGELOG.md` (flutter/flutter#167225)

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Reason for revert: #167418

@loic-sharma loic-sharma added the revert Autorevert PR (with "Reason for revert:" comment) label Apr 18, 2025
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loic-sharma added a commit to loic-sharma/flutter that referenced this pull request Apr 18, 2025
ash2moon pushed a commit to ash2moon/flutter that referenced this pull request Apr 21, 2025
…3726)

This enables running UI isolate on platform thread by default. 

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
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Co-authored-by: Loïc Sharma <[email protected]>
github-merge-queue bot pushed a commit that referenced this pull request Apr 28, 2025
…167472)

This relands #163726 without
changes.

The likely reason for flakiness was
#166918
(#167418 (comment)).

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CodixNinja pushed a commit to CodixNinja/packages that referenced this pull request May 15, 2025
flutter/flutter@ecabb1a...3ed38e2

2025-04-18 [email protected] Update `led` docs (flutter/flutter#167380)
2025-04-18 [email protected] Throw an error if --local-engine-host is used without --local-engine (flutter/flutter#166948)
2025-04-18 [email protected] Add kotlin compatability to build file validation (flutter/flutter#167143)
2025-04-18 [email protected] Roll Skia from 844496884aa0 to 6c4595124690 (2 revisions) (flutter/flutter#167400)
2025-04-18 [email protected] Fix CarouselView crashes when initlal viewportDimension is 0.0 (flutter/flutter#167271)
2025-04-18 [email protected] Roll Dart SDK from b1eb743f97f5 to ab60afc99bcb (1 revision) (flutter/flutter#167396)
2025-04-18 [email protected] Add InputDecoration.visualDensity and InputDecorationTheme.visualDensity (flutter/flutter#166834)
2025-04-18 [email protected] Roll Skia from acc910544da7 to 844496884aa0 (1 revision) (flutter/flutter#167389)
2025-04-18 [email protected] Roll Skia from a409d685a711 to acc910544da7 (10 revisions) (flutter/flutter#167388)
2025-04-18 [email protected] Roll Dart SDK from 2bb85834e77e to b1eb743f97f5 (2 revisions) (flutter/flutter#167387)
2025-04-18 [email protected] Roll Fuchsia Linux SDK from m8Aln7fTF_8zy1V9N... to MwYckh5OvwwmIYLx0... (flutter/flutter#167385)
2025-04-17 [email protected] Roll Skia from cc2b57434651 to a409d685a711 (3 revisions) (flutter/flutter#167347)
2025-04-17 [email protected] Reduce app startup latency by initializing the engine on a separate thread (flutter/flutter#166918)
2025-04-17 [email protected] Roll Dart SDK from 992221a362ec to 2bb85834e77e (7 revisions) (flutter/flutter#167361)
2025-04-17 [email protected] Added docstring for FilterInput::GetSnapshot (flutter/flutter#167226)
2025-04-17 [email protected] adds Entity docstrings (flutter/flutter#167228)
2025-04-17 [email protected] fixed impeller golden content scale (flutter/flutter#167308)
2025-04-17 [email protected] Added docstring for FilterContents::RenderFilter (flutter/flutter#167227)
2025-04-17 [email protected] Feat: Add equality to NoDefaultCupertinoThemeData (flutter/flutter#166655)
2025-04-17 [email protected] Fix link to engine docs (flutter/flutter#167346)
2025-04-17 [email protected] [macOS] Enable merged platform and UI thread by default (flutter/flutter#166536)
2025-04-17 [email protected] [Windows] Enable merged platform and UI thread by default (flutter/flutter#163726)
2025-04-17 [email protected] Update `CHANGELOG.md` (flutter/flutter#167225)

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androidseb pushed a commit to androidseb/packages that referenced this pull request Jun 8, 2025
…r#9114)

flutter/flutter@ecabb1a...3ed38e2

2025-04-18 [email protected] Update `led` docs (flutter/flutter#167380)
2025-04-18 [email protected] Throw an error if --local-engine-host is used without --local-engine (flutter/flutter#166948)
2025-04-18 [email protected] Add kotlin compatability to build file validation (flutter/flutter#167143)
2025-04-18 [email protected] Roll Skia from 844496884aa0 to 6c4595124690 (2 revisions) (flutter/flutter#167400)
2025-04-18 [email protected] Fix CarouselView crashes when initlal viewportDimension is 0.0 (flutter/flutter#167271)
2025-04-18 [email protected] Roll Dart SDK from b1eb743f97f5 to ab60afc99bcb (1 revision) (flutter/flutter#167396)
2025-04-18 [email protected] Add InputDecoration.visualDensity and InputDecorationTheme.visualDensity (flutter/flutter#166834)
2025-04-18 [email protected] Roll Skia from acc910544da7 to 844496884aa0 (1 revision) (flutter/flutter#167389)
2025-04-18 [email protected] Roll Skia from a409d685a711 to acc910544da7 (10 revisions) (flutter/flutter#167388)
2025-04-18 [email protected] Roll Dart SDK from 2bb85834e77e to b1eb743f97f5 (2 revisions) (flutter/flutter#167387)
2025-04-18 [email protected] Roll Fuchsia Linux SDK from m8Aln7fTF_8zy1V9N... to MwYckh5OvwwmIYLx0... (flutter/flutter#167385)
2025-04-17 [email protected] Roll Skia from cc2b57434651 to a409d685a711 (3 revisions) (flutter/flutter#167347)
2025-04-17 [email protected] Reduce app startup latency by initializing the engine on a separate thread (flutter/flutter#166918)
2025-04-17 [email protected] Roll Dart SDK from 992221a362ec to 2bb85834e77e (7 revisions) (flutter/flutter#167361)
2025-04-17 [email protected] Added docstring for FilterInput::GetSnapshot (flutter/flutter#167226)
2025-04-17 [email protected] adds Entity docstrings (flutter/flutter#167228)
2025-04-17 [email protected] fixed impeller golden content scale (flutter/flutter#167308)
2025-04-17 [email protected] Added docstring for FilterContents::RenderFilter (flutter/flutter#167227)
2025-04-17 [email protected] Feat: Add equality to NoDefaultCupertinoThemeData (flutter/flutter#166655)
2025-04-17 [email protected] Fix link to engine docs (flutter/flutter#167346)
2025-04-17 [email protected] [macOS] Enable merged platform and UI thread by default (flutter/flutter#166536)
2025-04-17 [email protected] [Windows] Enable merged platform and UI thread by default (flutter/flutter#163726)
2025-04-17 [email protected] Update `CHANGELOG.md` (flutter/flutter#167225)

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FMorschel pushed a commit to FMorschel/packages that referenced this pull request Jun 9, 2025
…r#9114)

flutter/flutter@ecabb1a...3ed38e2

2025-04-18 [email protected] Update `led` docs (flutter/flutter#167380)
2025-04-18 [email protected] Throw an error if --local-engine-host is used without --local-engine (flutter/flutter#166948)
2025-04-18 [email protected] Add kotlin compatability to build file validation (flutter/flutter#167143)
2025-04-18 [email protected] Roll Skia from 844496884aa0 to 6c4595124690 (2 revisions) (flutter/flutter#167400)
2025-04-18 [email protected] Fix CarouselView crashes when initlal viewportDimension is 0.0 (flutter/flutter#167271)
2025-04-18 [email protected] Roll Dart SDK from b1eb743f97f5 to ab60afc99bcb (1 revision) (flutter/flutter#167396)
2025-04-18 [email protected] Add InputDecoration.visualDensity and InputDecorationTheme.visualDensity (flutter/flutter#166834)
2025-04-18 [email protected] Roll Skia from acc910544da7 to 844496884aa0 (1 revision) (flutter/flutter#167389)
2025-04-18 [email protected] Roll Skia from a409d685a711 to acc910544da7 (10 revisions) (flutter/flutter#167388)
2025-04-18 [email protected] Roll Dart SDK from 2bb85834e77e to b1eb743f97f5 (2 revisions) (flutter/flutter#167387)
2025-04-18 [email protected] Roll Fuchsia Linux SDK from m8Aln7fTF_8zy1V9N... to MwYckh5OvwwmIYLx0... (flutter/flutter#167385)
2025-04-17 [email protected] Roll Skia from cc2b57434651 to a409d685a711 (3 revisions) (flutter/flutter#167347)
2025-04-17 [email protected] Reduce app startup latency by initializing the engine on a separate thread (flutter/flutter#166918)
2025-04-17 [email protected] Roll Dart SDK from 992221a362ec to 2bb85834e77e (7 revisions) (flutter/flutter#167361)
2025-04-17 [email protected] Added docstring for FilterInput::GetSnapshot (flutter/flutter#167226)
2025-04-17 [email protected] adds Entity docstrings (flutter/flutter#167228)
2025-04-17 [email protected] fixed impeller golden content scale (flutter/flutter#167308)
2025-04-17 [email protected] Added docstring for FilterContents::RenderFilter (flutter/flutter#167227)
2025-04-17 [email protected] Feat: Add equality to NoDefaultCupertinoThemeData (flutter/flutter#166655)
2025-04-17 [email protected] Fix link to engine docs (flutter/flutter#167346)
2025-04-17 [email protected] [macOS] Enable merged platform and UI thread by default (flutter/flutter#166536)
2025-04-17 [email protected] [Windows] Enable merged platform and UI thread by default (flutter/flutter#163726)
2025-04-17 [email protected] Update `CHANGELOG.md` (flutter/flutter#167225)

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Ortes pushed a commit to Ortes/packages that referenced this pull request Jun 25, 2025
…r#9114)

flutter/flutter@ecabb1a...3ed38e2

2025-04-18 [email protected] Update `led` docs (flutter/flutter#167380)
2025-04-18 [email protected] Throw an error if --local-engine-host is used without --local-engine (flutter/flutter#166948)
2025-04-18 [email protected] Add kotlin compatability to build file validation (flutter/flutter#167143)
2025-04-18 [email protected] Roll Skia from 844496884aa0 to 6c4595124690 (2 revisions) (flutter/flutter#167400)
2025-04-18 [email protected] Fix CarouselView crashes when initlal viewportDimension is 0.0 (flutter/flutter#167271)
2025-04-18 [email protected] Roll Dart SDK from b1eb743f97f5 to ab60afc99bcb (1 revision) (flutter/flutter#167396)
2025-04-18 [email protected] Add InputDecoration.visualDensity and InputDecorationTheme.visualDensity (flutter/flutter#166834)
2025-04-18 [email protected] Roll Skia from acc910544da7 to 844496884aa0 (1 revision) (flutter/flutter#167389)
2025-04-18 [email protected] Roll Skia from a409d685a711 to acc910544da7 (10 revisions) (flutter/flutter#167388)
2025-04-18 [email protected] Roll Dart SDK from 2bb85834e77e to b1eb743f97f5 (2 revisions) (flutter/flutter#167387)
2025-04-18 [email protected] Roll Fuchsia Linux SDK from m8Aln7fTF_8zy1V9N... to MwYckh5OvwwmIYLx0... (flutter/flutter#167385)
2025-04-17 [email protected] Roll Skia from cc2b57434651 to a409d685a711 (3 revisions) (flutter/flutter#167347)
2025-04-17 [email protected] Reduce app startup latency by initializing the engine on a separate thread (flutter/flutter#166918)
2025-04-17 [email protected] Roll Dart SDK from 992221a362ec to 2bb85834e77e (7 revisions) (flutter/flutter#167361)
2025-04-17 [email protected] Added docstring for FilterInput::GetSnapshot (flutter/flutter#167226)
2025-04-17 [email protected] adds Entity docstrings (flutter/flutter#167228)
2025-04-17 [email protected] fixed impeller golden content scale (flutter/flutter#167308)
2025-04-17 [email protected] Added docstring for FilterContents::RenderFilter (flutter/flutter#167227)
2025-04-17 [email protected] Feat: Add equality to NoDefaultCupertinoThemeData (flutter/flutter#166655)
2025-04-17 [email protected] Fix link to engine docs (flutter/flutter#167346)
2025-04-17 [email protected] [macOS] Enable merged platform and UI thread by default (flutter/flutter#166536)
2025-04-17 [email protected] [Windows] Enable merged platform and UI thread by default (flutter/flutter#163726)
2025-04-17 [email protected] Update `CHANGELOG.md` (flutter/flutter#167225)

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romanejaquez pushed a commit to romanejaquez/flutter that referenced this pull request Aug 14, 2025
…3726)

This enables running UI isolate on platform thread by default. 

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Co-authored-by: Loïc Sharma <[email protected]>
romanejaquez pushed a commit to romanejaquez/flutter that referenced this pull request Aug 14, 2025
…lutter#167472)

This relands flutter#163726 without
changes.

The likely reason for flakiness was
flutter#166918
(flutter#167418 (comment)).

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